After receiving a vision from Obi-Wan Kenobi and fleeing the ice world of Hoth with his friends after an Imperial attack, Luke Skywalker travels to the marsh planet of Dagobah, where he is instructed in the ways of the Force by the legendary Jedi master Yoda. Meanwhile, Han Solo and Princess Leia make their way to planet Bespin, where they are greeted by Han's old friend, a shifty gambler named Lando Calrissian. Ambushed by the Empire shortly after their arrival, Han and his friends are imprisoned by Darth Vader. Luke leaves Dagobah to rescue his friends, and is met by Vader and a startling revelation.